Based on the ACSC Annual Cyber Threat Report 2024–25 and broader industry trends, the biggest cybersecurity threats remain ransomware and extortion, phishing and credential theft, business email compromise, and attacks targeting exposed edge or cloud services. Threat actors are increasingly using automation and AI-assisted techniques to scale social engineering and identify vulnerable systems. Maintaining the Essential Eight, strong identity security (MFA, conditional access, least privilege), and rapid patching are the most practical ways to reduce exposure.